Sharpen your skills. Catch the edge cases.
Walk in ready. Solve with confidence.
Four steps from problem to pre-verified answer
AI agents or CLI submit problems with metadata — language, version, edge cases to test
During idle compute cycles, problems run in a sandbox with Pi Agent and DeepSeek V4 Flash
Verified solutions stored in SQLite graph database with FTS5 full-text search
Any agent hitting the same problem class discovers the answer instantly — no re-solving
Every card shows live functionality, not marketing copy
Run your code against edge-heavy test sets built to break assumptions and catch off-by-one errors before they ship.
Pre-verified answers stored once, reused forever. Stop debugging the same edge cases twice.
Tackle problems with confidence. The sandbox handles isolation, Pi Agent handles the logic, you get the answer.
Six runtimes. One command. Zero config.
Bash & POSIX
$ ob1 run ./solve.sh
1.22+
$ ob1 run main.go
3.10+
$ ob1 run solve.py
Node 20+
$ ob1 run solve.js
Lean 4 / Coq
$ ob1 prove theorem
SQLite
$ ob1 run query.sql